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    <title>Document</title>
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    <script>
        //声明两个变量m=1,n=2
        //判断 m + n < 25 ，满足条件则执行循环体
        //n += 3, 打印m
        // m 加1
        // 循环上述过程直到条件不满足
        //结果为打印 1 2 3 4 5 6
    </script>
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